Magnetic, Structural, and Electrical Properties of Si1−xMnx Single Crystals

Abstract

We have investigated the magnetic and the electrical transport properties of Si 1-xMn x (x = 0.5 and 0.75) single crystals grown by using the vertical Bridgman method. The alloys with the Mn concentration x = 0.5 have weak ferromagnetic ordering around T C ≃30 K. However, Si 0.25Mn 0.75 alloys show weak ferromagnetic ordering at 70 K and antiferromagnetic ordering at 104 K, which is confirmed by magnetization, electrical transport, and neutron diffraction studies. The conductivities appear to be n-type for samples with x = 0.5 and p-type for x = 0.75.